Electronically Tunable Voltage-mode Universal Biquadratic Filter with One Input and Five Outputs Using DDCCTAs

An electronically tunable voltage-mode universal biquadratic filter with one input and five output terminals employing differential difference current conveyor transconductance amplifiers (DDCCTAs) has been proposed. The proposed circuit uses only two DDCCTAs, two grounded resistors and two grounded capacitors. It can realize all the five standard biquadratic filter functions, namely lowpass, bandpass, highpass, bandstop and allpass, simultaneously, without changing the circuit configuration and the passive elements. The proposed circuit provides the advantage features of high-input impedance, independent electronic control of natural angular frequency (0) and quality factor (Q), using only grounded passive elements as well as low sensitivity performance. The workability of the circuit is established through computer simulation.